Furniture would be the noun . (Example: The only furniture in her new house was a couch.) Furnishing would normally be used as a verb. (Example: They were furnishing the house with brand new furniture from IKEA.)

Hey! Furnishings can include rugs, curtains, lamps, or anything like this. Furniture does not. I hope this helps! If you need anything else, feel free to look at my native speaker teacher profile. ☺️

Furniture refers to specific pieces Of furniture for example a sofa or a chair whereas furnishing is a general term for all the furniture that makes the house comfortable to live in